2uzfe Ecu Pinout | [verified]

The 2UZ uses a hot-wire MAF. Pin (Signal) and E2G (MAF Ground). If you use cheap wire splices, the voltage drop on the ground wire will shift the MAF reading by 10-15%. The engine will run lean at cruise and rich at WOT. Fix: Solder and heat shrink. Never use a T-tap on a MAF ground.

Switched 12V ignition power from the key switch to turn the ECU on. 2uzfe ecu pinout

High-amperage power grounds connecting directly to the engine block or chassis frame. The 2UZ uses a hot-wire MAF

Ignition switch signal that tells the ECU to wake up when you turn the key. E1, E2, E21: ECU internal grounds. E21: ECU internal grounds.